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(No Model.) 3Sheets-Sheet 1. Q

G. S. PARTRIDGE. A

MATRIX MAKING MAGHINE No. 407,608. Patented July 23, 1889.

PEYERS, Pnamwm n hen Ilushmglnlu D a (No Model.)

' 3 Sheets-Sheet 2. O. S. PARTRIDGE. MATRIX MAKING MACHINE.-

Patented July 23,1889.

NITED TATES PATENT QFFIQE.

CHARLES S. PARTRIDGE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE A. N.

KELLOGG NEIVSPAPER COMPANY, OF SAME PLACE.

MATRIX-MAKING MACHIN E.

SPECIFICATION forming part of Letters Patent No. 407,608, dated J uly23, 1889.

Application filed September22, 1888. Serial No. 286,106. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES S. PARTRIDGE, a citizen of the UnitedStates, residing in Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Improvement in Matrix- MakingMachines, of which the following is a specification.

In making papier-mach matrices for use in the production ofstereotype-plates it is customary to beat the soft matrix material,after it has been laid upon the form of type which is to be reproduced,with a bristle brush until the material has been forced into thehollows, recesses, and interstices of the type and into the blanks oropen portions 'of the form and an accurate impression of the typeformhas been produced in the matrix. The beating is continued until thematerial has penetrated the interstices, &c., to the depth requisite toavoid shallowness of the sunken or non-printing portions of the type, itbeing desirable that such portions shall be so much below the printingportions in the stereotype as to avoid smuttin g in printing therefrom.This beating operation requires considerable time, and is laborious workfor the operator. Another method is to pass a pressure-roller over thematrix while it is on the type, a thick felt blanket or other cushionbeing interposed between the matrix and roller, so that the pressure ofthe roller will force the soft material of the matrix into the hollowsand spaces of the type-form without uncovering the faces of the type.This method is quicker than the other and less laborious, but it issubject to serious objections. It is impossible by it to make asufficiently deep mold with out increasing the pressure to such a pointas will injure the type, and to avoid this it is quite common to finishthe mold bybeating it with the hand-brush after ithas been rolled.\Vhere this is not done a shallow mold is produced, thestereotype-plates from which cannot be worked on printing-presses usingvery soft impression-blankets without smutting.

In this invention I have sought to produce a machine which will performthe operation of beating the papier-mach evenly and with resultsapproximating those obtained by h and, and which will avoid at the sametime the evils found in the pressure-roller method of taking impressionsfrom the type.

The machine which I have devisedembodies a support or table upon whichthe type-form with its superimposed papier-mach may be placed, and arapidly-vibratin g brush located over the bed and adapted to beat thematerial into the type with light yielding blows analogous to thoseimparted by hand. There are also other features of novelty in themachine, which are fully set forth below.

In the accompanyingdrawings, which form a part of this specification,and in which similar letters of reference indicate like parts, Figure 1is a plan view of my improved machine. Fi 2 is a side elevation, andFig. 3 is a longitudinal vertical section, of the same. Fig. 4 is adetail showing the manner of attaching the brush to its carrying-arm.

In said drawings, A represents a table or support for the type-form,-the chase of which. appears at "u, and the soft mold or matrix materiallaid thereon at w. preferably a reciprocating one, sliding on theways 1) upon the frame B, and actuated by gears O, meshing with theracks (L of the table. The gears O are mounted upon the crossshaft 0,which also carries a gear D, meshing with a worm (Z upon thelongitudinal shaft E, driven by the pulley e. Idle-pulleys F are alsoprovided on said shaft E, each of which has its own belt, one running ina contrary direction to the other, and both controlled by the shifter f,thus allowing the actuating of pulley e in either direction desired toproduce the proper movement of the table by simply moving said shifterto throw the proper belt upon the pulley c.

G is the brush for beating the mold into the form. It extends across thetable and is can ried by arms g, which are secured to short journals h,the latter having bearings at "i Said table is and carrying crank-armsII. Said arms H, in

connection with journals h and arms g, form bell-crank levers, and areforked at their lower ends and pivotally joined to the boxes J, looselyencircling the eccentric-rods K, actuated by eccentrics K upon thecrossshaft L, driven by a third belt applied to pulley M. Theeccentric-rods carry nuts j at either side of the boxes J, andinterposed between such nuts and the boxes are springs on on, so that assuch eccentric-rods are moved back and forth they apply a yielding forceto the crank-arms H, which is transmitted to the brush, causing thelatter to strike quickly but lightly upon the matrix. This constructionprevents the brush from striking positive or, as they might be termed,dead blows, such as would be caused if all the actuating parts wererigid and unyielding and the range of movement of the brush wasaccurately and precisely limited and controlled. In the latter case, ifthe mechanism was so adjusted that the brush at the lowest point of itsstroke should simply touch the form it would be inefiective, While, onthe other hand, if it reached too low a point, it would be forcedthrough the matrix and ruin the mold, so that perfect adjustment of thebrush would be very essential; but with the elastic actuating devicesthe stroke accommodates itself to the necessities of the case, avoidinginjury to themold on the one hand and insuring eifective work on theother. Very accurate adjusting of the brush is not requisite; but I findit to do the best work when set to reach a level slightly below thelevel of the form. \Vith each movement the springs at one side of theswivel-boxes J will be compressed and those at the other side relaxed,allowing the eccentric-rods to pass through the boxes, while the instantrecovery of the springs helps to induce a rebound of the brush, thusclosely imitating the hand beating.

The brush may be made of any length necessary to cover the widest form,and also be wide or narrow, as desired. For ordinary newspaper-work Iprefer a brush about six inches in width and long enough to cover bothtype and chase, for the following reasons: It is usually the case thatsome of the pages of the daily papers are made up of display matter andthe spaces between the lines and words of such matter are very large.\Vith a small brush there would be danger that a low such as would bejust sufficientfor solid matter would be too severe for the open-workdisplay matter; but by making the brush long enough to cover both chaseand type, or about six inches in width, danger of this kind will beavoided, as the chase will hold the brush up and so limit its strokewithin safe range.

\Vhile the mechanism thus far described is capable of use with goodresults and a saving of time and labor, I prefer to pass the matrix asit leaves the brush under a pressure-roller N upon the shaft 0, suchroller being covered by a soft blanket n, carried over and kept tight byan upper roller 0. By the pressure of roller N the matrix is fartherimpressed into the types, and more particularly into the spaces of theform, and any imperfections in the work of the brush are corrected. Thepressure of this roller is much less than that heretofore employed inroller matrix machines and not sufficient to do injury to the type, butI deem its use saves some portion of the brush beating. The matrixhaving passed once under both brush and roller, as described, should beready to receive the backing-powder.

- P is an idle-roller located under the table and in the same verticalplane with the pressure-roller N. It is intended to take the straincaused by said roller N and relieve the friction, which would otherwisebe caused between the table and its slideways.

The brush is preferably made adjustable at its attachment to the arms g,so that all parts of its surface may be made to come in contact with theform, and so the wear may be takenup. This result is obtained by meansof the supporting-bolts R and the nuts 0', mounted thereon at eitherside of the arms J.

I claim-- I. The combination, with the table for supporting the form tobe stereotyped, of an elastically-operated beaiing-brush located overthe table and adapted to beat the matrix material into the type,substantially as specified.

2. In a machine for impressing the matrix upon the type, a vibratingbrush and its carrying-levers, in combination with the eccentric-rodsand the springs by which the actuating-power transmitted to the brush isrendered elastic, substantially as specified.

3. In a machine for impressing the matrix upon the type, a vibratingbrush and its carrying-levers, in combination with the eccentric-rodsand the springs interposed between said levers and the stops at bothsides of the levers, substantially as specified.

4. In a machine for impressing the matrix upon the type, the combinationof a vibrating brush for beating the matrix and apressure-roller forpressing it with a traveling table for carrying the form under saidbrush and roller, substantially as specified.

5. The combination of the vibrating brush, the pressure-roller, theblanket, roller 0, and the moving table, substantially as specified.

'JIIARLES S. PARTRID GE.

NVitnesses:

II. M. MUNDAY, EDMUND ADCOCK.

